It's easier with two people.
Have one sit in the door way and plant C4 outside so when they see the juggernaut, they can at least hurt it. Then let the juggernaut down the person in the door...doing this will block the juggernaut from getting in the room. The other person needs to hide behind the table, using their Thumper the most, throwing flash grenades and C4 at the door. Have the person in the doorway let the other person know if it is clear to revive them.
You can also do it like the above method, but have both people in the room. One person prone behind the wooden chair with a clear view at the door. The other person needs to hide behind the wall, popping in and out of view of the juggernaut. It helps to [strategically*] place claymores and C4 (Strategically meaning, not too close together, not too close to you, and in a good position to do the most damage). After you kill each juggernaut, go outside and refill on ammo. When there are about 5 or 6 juggernauts left, then do the doorway method.
*For C4, Place them more above the head of the juggernaut to do the most damage and place claymores around corners near the building.